The timeline on my time machine went back to mid 2012. Now, it only goes back to Oct 2013. I have never had any errors or failures - nor has the disk filled up. I have a 2TB disk that is showing 31GB free. I could understand that IF all the backups were there to 2012 but not if it only contains backups from 2 months ago. With only 2 months of backups I would expect 80% of the 2TB to be free. If I look at the backups folder on the drive it contains several folders but they only date back to Oct 2013 too. Why have the remainder of my backups gone and why cant I see them?